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A236124 Number of (n+1)X(1+1) 0..3 arrays colored with the maximum plus the upper median minus the lower median of every 2X2 subblock 1
256, 2782, 30660, 337810, 3723012, 41005528, 451716944, 4976199592, 54818616784, 603883903276, 6652433429276, 73283772351660, 807300186654896, 8893283636544700, 97969139280841724, 1079236054749770148 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A236127

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 366*a(n-3) +5214*a(n-4) +31156*a(n-5) +218596*a(n-6) +873948*a(n-7) +2635751*a(n-8) +5977356*a(n-9) -16093852*a(n-10) -118223502*a(n-11) -524290652*a(n-12) -1690658088*a(n-13) -1592328920*a(n-14) +2665018428*a(n-15) +26560571720*a(n-16) +105162595088*a(n-17) +148035552816*a(n-18) +69121017376*a(n-19) -494484957456*a(n-20) -2549401014912*a(n-21) -3683380168064*a(n-22) -1704351546880*a(n-23) +4457382091776*a(n-24) +26850059834368*a(n-25) +39027657178112*a(n-26) +4608574113792*a(n-27) -39172991209472*a(n-28) -121770582523904*a(n-29) -167682872999936*a(n-30) +44004650811392*a(n-31) +256981414051840*a(n-32) +167599333048320*a(n-33) +6043975286784*a(n-34) -84314060488704*a(n-35) -108348177383424*a(n-36) -43980599328768*a(n-37) +7552163119104*a(n-38) +6707799392256*a(n-39) +782757789696*a(n-40)

EXAMPLE

Some solutions for n=3

..2..1....2..3....2..3....2..0....3..0....2..1....2..0....0..1....3..0....0..0

..0..0....1..1....3..3....0..2....1..0....0..2....3..0....0..0....3..0....0..0

..0..1....3..0....2..2....0..0....0..0....2..2....3..3....3..1....3..2....1..1

..0..1....0..3....2..0....2..3....2..3....1..1....0..0....3..0....2..0....0..3

CROSSREFS

Sequence in context: A205422 A205417 A236127 * A236949 A236942 A236137

Adjacent sequences:  A236121 A236122 A236123 * A236125 A236126 A236127

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 19 2014

STATUS

approved

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Last modified September 27 20:41 EDT 2021. Contains 347694 sequences. (Running on oeis4.)